From dadb157df58e79c7f560cacae80ea51953606fca Mon Sep 17 00:00:00 2001
From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Date: Sun, 11 Apr 2021 11:02:20 +0200
Subject: [PATCH] configure: add -D_GNU_SOURCE
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This will fix the following build failure with uclibc-ng which is raised
since version 1.0.6.1 and
https://github.com/skarnet/s6-linux-init/commit/355a75e08bbc8af8af97576bad07471dd1b431d8:

src/shutdown/s6-linux-init-shutdownd.c: In function ‘main’:
src/shutdown/s6-linux-init-shutdownd.c:294:24: error: ‘F_DUPFD_CLOEXEC’ undeclared (first use in this function); did you mean ‘FD_CLOEXEC’?
  294 |       fd[0] = fcntl(1, F_DUPFD_CLOEXEC, 0) ;
      |                        ^~~~~~~~~~~~~~~
      |                        FD_CLOEXEC

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
[Upstream status: https://github.com/skarnet/s6-linux-init/pull/3]
---
 configure | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/configure b/configure
index 47db5b2..90fbb3b 100755
--- a/configure
+++ b/configure
@@ -138,7 +138,7 @@ getmacrostring () {
 # Actual script
 
 CC_AUTO=
-CPPFLAGS_AUTO="-D_POSIX_C_SOURCE=200809L -D_XOPEN_SOURCE=700 -iquote src/include-local -Isrc/include"
+CPPFLAGS_AUTO="-D_GNU_SOURCE -D_POSIX_C_SOURCE=200809L -D_XOPEN_SOURCE=700 -iquote src/include-local -Isrc/include"
 CPPFLAGS_POST="$CPPFLAGS"
 CPPFLAGS=
 CFLAGS_AUTO="-pipe -Wall"
-- 
2.30.2

